Cron Monthly Generator
Pre-loaded with 0 0 1 * * — fires on the 1st of every month at midnight.
How do you write a monthly cron expression?
0 0 1 * * fires once a month, at midnight on the 1st — the canonical 'monthly' cron expression and the equivalent of `@monthly`. The third field (day of month) is set to 1, while month (4th field) and day-of-week (5th field) stay as wildcards. Monthly jobs are common for: invoicing and billing rollups, archiving last month's data, generating monthly reports, rotating long-lived credentials, or aging out old records. Change the `1` to any day 1–28 for safety; days 29–31 don't exist in every month.
Visual Builder
Presets
Manual
Minute0-59, * for every, */5 for every 5 minutes
Hour0-23, * for every, */2 for every 2 hours
Day of Month1-31, * for every, 1,15 for specific days
Month1-12, * for every, 1-6 for Jan through Jun
Day of Week0-6 (0=Sunday), * for every, 1-5 for weekdays
Generated Expression
0 0 1 * *
At minute 0 past hour 0 on day 1 of the month
Next 5 Runs:
6/1/2026, 12:00:00 AM7/1/2026, 12:00:00 AM8/1/2026, 12:00:00 AM9/1/2026, 12:00:00 AM10/1/2026, 12:00:00 AM
Cron Reference
Special Characters
* Any value
, Value list separator
- Range of values
/ Step values
Day of Week Values
0=Sun1=Mon2=Tue3=Wed4=Thu5=Fri6=Sat
About the monthly cron pattern
0 0 1 * * fires once a month at midnight on the 1st in the daemon's local time zone.
- Field positions: minute hour day-of-month month day-of-week
- Day of month is the 3rd field — valid range 1–31 (no 'last day' shortcut)
- Equivalent shortcut: @monthly (Vixie cron extension, not in AWS/Kubernetes)
- Setting both day-of-month AND day-of-week is OR semantics on Vixie cron — not AND